Consumption of oil happens at 50-70% per quart when operated for 24 hours continuously. Good quality synthetic oil should be added with constant check.
Their cooling system is similar to an automobile where the enclosed radiator systems are used and no mess is generated in the process. They are larger in size and produce more energy. It is used in small or medium businesses and large homes.
The main difference is that the engine uses fans to force air across to cool it. They are valuable to homeowners interested in backing up critical circuits
Buying the right size generator isn’t as difficult as you think. Just add up wattages of all the electrical appliances you would want to use during power outage. Some appliances like refrigerators, heaters, sump pumps, air conditioners require more wattage called surge watts.